/*************************************************************************** hashing.h Hashing helper classes. **************************************************************************** Copyright Aaron Giles All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name 'MAME' nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ***************************************************************************/ #pragma once #ifndef __HASHING_H__ #define __HASHING_H__ #include "osdcore.h" #include "astring.h" #include "md5.h" #include "sha1.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> SHA-1 // final digest struct sha1_t { bool operator==(const sha1_t &rhs) const { return memcmp(m_raw, rhs.m_raw, sizeof(m_raw)) == 0; } bool operator!=(const sha1_t &rhs) const { return memcmp(m_raw, rhs.m_raw, sizeof(m_raw)) != 0; } operator UINT8 *() { return m_raw; } bool from_string(const char *string, int length = -1); const char *as_string(astring &buffer) const; UINT8 m_raw[20]; static const sha1_t null; }; // creation helper class sha1_creator { public: // construction/destruction sha1_creator() { reset(); } // reset void reset() { sha1_init(&m_context); } // append data void append(const void *data, UINT32 length) { sha1_update(&m_context, length, reinterpret_cast(data)); } // finalize and compute the final digest sha1_t finish() { sha1_t result; sha1_final(&m_context); sha1_digest(&m_context, sizeof(result.m_raw), result.m_raw); return result; } // static wrapper to just get the digest from a block static sha1_t simple(const void *data, UINT32 length) { sha1_creator creator; creator.append(data, length); return creator.finish(); } protected: // internal state struct sha1_ctx m_context; // internal context }; // ======================> MD5 // final digest struct md5_t { bool operator==(const md5_t &rhs) const { return memcmp(m_raw, rhs.m_raw, sizeof(m_raw)) == 0; } bool operator!=(const md5_t &rhs) const { return memcmp(m_raw, rhs.m_raw, sizeof(m_raw)) != 0; } operator UINT8 *() { return m_raw; } bool from_string(const char *string, int length = -1); const char *as_string(astring &buffer) const; UINT8 m_raw[16]; static const md5_t null; }; // creation helper class md5_creator { public: // construction/destruction md5_creator() { reset(); } // reset void reset() { MD5Init(&m_context); } // append data void append(const void *data, UINT32 length) { MD5Update(&m_context, reinterpret_cast(data), length); } // finalize and compute the final digest md5_t finish() { md5_t result; MD5Final(result.m_raw, &m_context); return result; } // static wrapper to just get the digest from a block static md5_t simple(const void *data, UINT32 length) { md5_creator creator; creator.append(data, length); return creator.finish(); } protected: // internal state struct MD5Context m_context; // internal context }; // ======================> CRC-32 // final digest struct crc32_t { bool operator==(const crc32_t &rhs) const { return m_raw == rhs.m_raw; } bool operator!=(const crc32_t &rhs) const { return m_raw != rhs.m_raw; } crc32_t &operator=(const UINT32 crc) { m_raw = crc; return *this; } operator UINT32() const { return m_raw; } bool from_string(const char *string, int length = -1); const char *as_string(astring &buffer) const; UINT32 m_raw; static const crc32_t null; }; // creation helper class crc32_creator { public: // construction/destruction crc32_creator() { reset(); } // reset void reset() { m_accum.m_raw = 0; } // append data void append(const void *data, UINT32 length); // finalize and compute the final digest crc32_t finish() { return m_accum; } // static wrapper to just get the digest from a block static crc32_t simple(const void *data, UINT32 length) { crc32_creator creator; creator.append(data, length); return creator.finish(); } protected: // internal state crc32_t m_accum; // internal accumulator }; // ======================> CRC-16 // final digest struct crc16_t { bool operator==(const crc16_t &rhs) const { return m_raw == rhs.m_raw; } bool operator!=(const crc16_t &rhs) const { return m_raw != rhs.m_raw; } crc16_t &operator=(const UINT16 crc) { m_raw = crc; return *this; } operator UINT16() const { return m_raw; } bool from_string(const char *string, int length = -1); const char *as_string(astring &buffer) const; UINT16 m_raw; static const crc16_t null; }; // creation helper class crc16_creator { public: // construction/destruction crc16_creator() { reset(); } // reset void reset() { m_accum.m_raw = 0xffff; } // append data void append(const void *data, UINT32 length); // finalize and compute the final digest crc16_t finish() { return m_accum; } // static wrapper to just get the digest from a block static crc16_t simple(const void *data, UINT32 length) { crc16_creator creator; creator.append(data, length); return creator.finish(); } protected: // internal state crc16_t m_accum; // internal accumulator }; #endif // __HASHING_H__